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  1. C

    mercruser core plug

    I have a mid 80's 140 mercruiser with a bad core plug. I know I need to pull the motor to get to this plus and inspect the block to see if it is cracked or not. My question is do I have to pull the drive unit to get this motor out? serial number on the valve cover is 6131166. There is also...
  2. C

    2007 135optimax overheating

    I have a 2007 135optimax and when I am running about 1000 to 1500rpm the motor starts to overheat. If I go faster or slower the temp. drops back to normal range. Is this a water impeller issue or something else?:cool:
  3. C

    question freeze out plug

    I have a 1983 regal166 with a 140 hp merc. inboard motor.I looks like I have a blown out freeze out plugin the back of the block. This is behind the starter and under the bell housing to the final drive unit. What is the best way to replace this plug. Should I pull the motor or do I pull the...
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